A school project team doing a renovation of a historic school is using the perfo

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试卷: LEED AP BD+C模拟题B[查看]
A school project team doing a renovation of a historic school is using the performance
rating method for whole building energy simulation. The school will use photovoltaic
panels, day lighting, under floor air distribution system and other energy saving
technologies. The school will use an estimated 2,895 (103 Btu) annually vs. a baseline
case of 4,763 (103 Btu). The team has fallen short of its goal to earn an exemplary
performance for Energy and Atmosphere Credit, Optimize Energy Performance. What is
the minimum amount of energy savings the team must find in addition to the current
model to earn the exemplary performance point?
A: 2,191 (1000 Btu)
B: 514 (1000 Btu)
C: 2,381(1000 Btu)
D: 323 (1000 Btu)

参考答案: D

本题解释:
Notes:
To earn exemplary performance point for EA Credit 1 the project must reduce energy use by 46%.
This is because the project is stated to be a renovation.
A 46% reduction in energy use from the baseline case of 4,763 would be:
4,763 X 0.54 = 2,572 (103 Btu)
We use 0.54 (1 - 0.46) because we need to find the design case for exemplary performance. The
design case is the actual amount of energy used (not saved). You could also do this:
4,763 - (4,763 X 0.46) = 2,572 (103 Btu)
We\'re trying to save 46% energy use, but the 46% savings calculation isn\'t what we need. We
need the design case which is the energy the building will use.
The team currently expects to use 2,895 (103 Btu) In order to meet the 46% requirement for
exemplary performance the team must reduce energy use an additional 323 (103 Btu).
2,895(103 Btu) - 2,572(103 Btu) design case = 323 (103 Btu)